1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
artcher [175]
3 years ago
8

7. Un niño tiene 35 kg esta sobre un trineo que tiene una masa de 5 kg. Si el niño y el trineo

Physics
1 answer:
FrozenT [24]3 years ago
7 0

Answer:

<em>El niño y el trineo se mueven a 3.61 m/s</em>

Explanation:

<em><u>Energía Cinética</u></em>

Un cuerpo de masa m que se mueve con rapidez v, posee una energía cinética de:

\displaystyle K =\frac{1}{2}mv^2

Se nos dice que un niño de 35 Kg está sobre un trineo de 5 Kg y ambos viajan juntos. La masa total del conjunto es m=40 Kg.

Además sabemos que su energía cinética es de 260 J y requerimos calcular su velocidad.

Eso lo haremos despejando v de la ecuación anterior:

\displaystyle v =\sqrt{\frac{2K}{m}}

\displaystyle v =\sqrt{\frac{2*260}{40}}

\displaystyle v =\sqrt{13}

v = 3.61 m/s

El niño y el trineo se mueven a 3.61 m/s

You might be interested in
What would happen if there were no decomposer?
olya-2409 [2.1K]
There would be a high amount of dead matter
3 0
3 years ago
Read 2 more answers
Use the equation V=IR to find resistance, potential difference or current given the other two quantities.
My name is Ann [436]

I= V/R

R= V/I these are the other two quantities

5 0
3 years ago
A 50-cm wire placed in an east-west direction is moved horizontally to the north with a speed of 2.0 m/s. the horizontal compone
Strike441 [17]

When a wire is moved inside uniform magnetic field then its free electrons will experience magnetic force on it due to which wire will have potential difference at its ends.

Now here we will have magnetic field due to earth and wire is moving in this constant field so induced emf is given by formula

EMF = v.(B x L)

given that

B = 25\mu Tj - 50\mu Tk

v = 2 m/s j

L = 0.50 m (-i)

now by using the above formula we will have

EMF = 2(j) .(25\mu j - 50\mu k) x (-0.50 i)

EMF = 2(j) .(12.5\mu k + 25\mu j)

EMF = 50 \mu Volts

5 0
3 years ago
Read 2 more answers
An average person can reach a maximum height of about 60 cm when jumping straight up from a crouched position. During the jump i
Iteru [2.4K]

Answer:

Explanation:

Height attained by body = 50 cm

= .5 m

Initial velocity = u

v² = u² - 2gh

0 = u² - 2gh

u² = 2 x 9.8 x .5

u = 3.13 m /s

During the initial period , the muscle stretches by around 10 cm during which force by ground reacts on the body and gives acceleration to achieve velocity of 3.13 m/s from zero .

v² = u² + 2as

3.13² = 0 + 2 a x .10

a = 49  m/s²

reaction by ground R

Net force

R-mg = ma

R= m ( g +a )

= mg + ma

=W + (W/g) x a

W ( 1 + a / g )

= W ( 1 + 49 / 9.8 )

= 6W

4 0
4 years ago
An alloy that contains mainly copper and tin is
zaharov [31]
An alloy that contains mainly copper and tin is bronze

6 0
4 years ago
Other questions:
  • A biker can ride at 12 m/s on a level road when there is no wind and at 7.5 m/s on a level road when there is a head wind of 5 m
    13·1 answer
  • On February 15, 2013, a superbolide meteor (brighter than the Sun) entered Earth's atmosphere over Chelyabinsk, Russia, and expl
    13·1 answer
  • What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s?
    8·1 answer
  • a car slows down from - 27.7 m/s to -10.9 m/s while undergoing a displacement of -105 m .what is its acceleration?
    11·1 answer
  • A bicycle tire has a radius of 0.23 m. The tire spins at a constant speed with a centripetal acceleration of 42 m/s2. What is th
    12·2 answers
  • Why are compounds containing carbon called organic chemicals
    8·1 answer
  • 20 POINTS WILL BE MARK BRAINLIEST<br><br> ATTACHED BELOW GAS LAW WORKSHEET
    8·1 answer
  • Which of the following is a force or motion that
    6·1 answer
  • You build a boat out of a shoebox. The dimensions are 30 centimeters x 20 centimeters x 10 centimeters. What is the maximum weig
    8·1 answer
  • Kitty is pushing her shopping trolley along the ground. She applies a constant force to move the trolley 4 m horizontally. If sh
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!